Motor fan mounting



F 1941- o. c. ELIASON ETAL 3 375 I I MOTOR FAN MOUNTIHG Filed Feb. 21, 1959 RCI INVENTORS EWGENT A rTOR/VEV Patented Feb. 18, 1941 UNITED STATES PATENT OFFICE MOTOR. FAN MOUNTING Application February 21, 1939, Serial No. 257,578

3 Claims.

This invention relates to motor fan mountings particularly for use with air filter devices, the object of the invention being to improve the construction and operation of such devices while reducing the noise generated thereby to a minimum level.

According to the invention, an air filter device is provided in which a motor operates a fan-wheel in a cylindrical casing for blowing dust laden air into a filter element in the form of an L-shaped fabric bag having means at one end thereof for attachment to means formed with the cylindrical casing, while means is provided at the lowermost disposed end of the bag for permitting the removal of the dust without detaching the filter element from the casing.

A cushioned base is provided for securing at three points thereon a pair of supporting elements having their free ends secured to the cylindrical casing for supporting it. A second frame structure in the casing serves for mounting a third frame structure which in turn supports the cage of a motor having its armature shaft extending from end to end thereof for mounting the fan-wheel in concentric relation to the casing and in coaxial alignment therewith. Means secured to the casing opposite the filter element serves as a guard for the fanwheel, such means having anopening following the contour of the motor and that of a-controlling switch attached thereto, while a plurality of detachable means carried by the casing support the other end of the filter element in an upright position so as to facilitate the operation of the bag closure for the removal of the dust.

Air filter devices constructed according to the invention have been found to be efficient in operation while being substantially noiseless.

Other novel features and advantages of, the invention will appear from the following description and by the claims appended thereto, reference being had to the accompanying drawing in which:

Fig. 1 is a side elevation of the air filter device shown with a number of operating parts in section; and

Fig. 2 is a rear view shown with the casing partly in section and a portion of the screen broken away.

As shown in Figs. 1 and 2 of the drawing the air filter device consists of a mounting plate l provided for securing a pair of supports II and I2, this mounting plate being in turn supported by four rubber cushions RC1, RC2, RC3 and RC4.

Support I2 is made of a steel strip bent substantially at right angles relative to the plane of base It and is secured to such plate by screws SC and 8C1, while support II, which is also formed of a steel strip, is secured to the mounting plate in by a screw SC: shown in Fig. 2 from which point the 'arms of this support extend tangentially to the cylindrical casing l3 where the. free ends of these arms are secured, as by rivets l4 shown in Fig. 1 while the upright extending arms of support I! are secured to the casing l3 by rivets I41: which also serve for securing the attaching portions Y1 and Y: of a substantially A-shaped frame I 5 to casing l3, the top portion of this frame I! being secured to the casing H by rivets I6, also serving for securing one arm of a handle I! to the casing l3.

Another A-shaped frame [3 has its attaching points Y: and Y4 secured to the casing l3 by rivets l3, and at its top portion by rivets Hat. which also serve for securing the other arm of handle I! to the wall of casing 13. On supports l5 and I3 is secured as by rivets 20, a plate 2i provided for securing a second mounting plate 22 thereon by a number of bolts 43. Mounting plate 22 in turn supports at two points, as 23, the cage of a motor 24 having its armature shaft 25 extending from its front bearing for mounting a fan-wheel 26 arranged for rotating movement in the cylindrical casing l3 while four washers as V of resilient material serve for cushioning the motor on its supporting plate 22.

The casing i3 adjacent its left edge is provided with four lug members 21, 23, 29 and 30, best seen in Fig. 2, to which a wire screen i3! is secured as by a number of screws 3|. This wire screen is provided with a central opening CO, the edge of which follows the contour of motor 24, of the supporting base 2| and of a switching device 32 provided for controlling the operation of the motor 24 and thereby that of the fanwheel 26.

The cylindrical casing i 3 is provided with two rings 33 and 43 best seen in Fig. 1. Ring 33 cooperates with a cord 33 for securing the dust bag 34 onto the casing l3, this bag being held in an upright position by a buckle 35--secured to the bag 34 and engaging hook members 36 and 31 at the top end of supporting rods 38 and 39, these rods having their lower ends removably engaging the sleeves 40 and 4| riveted to the cylindrical casing l3.

The dust bag 34 is provided at its lowermost disposed portion with a so-called zipper closure 42 provided for removing the dust therefrom without requiring the detaching and removing of this bag from the casing l3.

According to the construction above described, the motor mounting plate 22 and its cushioning washers V cooperate with the supports l and I8 and with the supports H and [2 to form a yieldable or resilient unit frame structure which effectively prevents the vibration generated by the motor and the fan-wheel actuated thereby from reaching the mounting plate I0 and con sequently the floor of the room in which the ar-- ticles to be cleaned are located, while cushions RC1, RC2, RC3 and RC4, whichare secured to the underside of the mounting plate, further insulate the complete unit thus formed from the room floor.

For removing the dust which is present in a room and on telephone apparatus therein, for example, the dust laden air is caused to pass through the screen I3l to the dust bag 34 due to the air current generated by the rotation of the fan-wheel 26 upon the operation of motor 24, this motor in turn being controlled by the manual operation of the switching device 32 shown in Fig. 2, connected to any suitable current source by the lead-in wire W. The dust so filtered may be collected by opening the zipper closure 42 without detaching and removing the dust bag from the casing I3. However, the bag may be removed from the casing, if desired, by simply loosening the cord 35 and removing the buckle from the hooks 36 and 31 of supporting bars 38 and 39 and these bars may also be removed from the sleeves 40 and 4| for facilitating the transportation 01 the device wherever needed.

What is claimed is:

1. In a motor fan mounting having an electric fan and a casing housing the fan, in combination with a mounting plate, a pair of supports secured to said plate for mounting the casing, a second pair of supports secured in the casing, a plate secured to the second-mentioned pair of supports and another support mounted on said plate for supporting the electric fan.

2. In a motor fan mounting having an electric fan and a casing housing the fan in combination with a mounting plate, a pair of supports secured to said plate for mounting the casing, a second pair of supports secured in the casing, a plate secured to the second-mentioned pair of supports, another support mounted on said plate for supporting the electric fan, a screen having an opening registering with the contour formed by the motor of the fan and said supporting plate, and means for securing said screen to means carried by the casing.

3. In a motor fan mounting having a casing housing the fan, in combination with a mounting plate, a pair of supporting members secured to said plate, one of said supports having arms extending upwardly to form two attachment points for the casing; the other of said supports having arms extending tangentially of the casing and in opposite directions to each other to form two attaching points, means for securing each of said arms to the casing, and a pair of supports each secured at three points in the casing for supporting the electric fan.

OSCAR C. ELIASON. EDGAR W. GENT. 

